public void Given_An_Order_Accepted_Event_When_Valid_Payment_Details_Have_Been_Recorded_Then_The_Process_Payment_Command_Is_Sent()
{
// Arrange
const int orderId = 1;
const int customerId = 2;
const int paymentId = 3;
PaymentDetails paymentDetails = new PaymentDetails {
PaymentId = paymentId
};
Mock <IBus> mockBus = new Mock <IBus>(MockBehavior.Strict);
mockBus.Setup(b => b.Send(It.Is <ProcessPaymentV1>(pc =>
pc.OrderId == orderId &&
pc.CustomerId == customerId)));
Mock <IPaymentsDataStore> mockPaymentsDataStore = new Mock <IPaymentsDataStore>(MockBehavior.Strict);
mockPaymentsDataStore
.Setup(x => x.CheckExists(orderId))
.Returns(true);
Mock <IApplicationLogger> mockLogger = new Mock <IApplicationLogger>(MockBehavior.Loose);
IHandleMessage <IOrderAcceptedV1> handler = new OrderAcceptedV1Handler(mockBus.Object, mockPaymentsDataStore.Object, mockLogger.Object);
IOrderAcceptedV1 message = new OrderAcceptedV1(customerId, orderId);
// Act
handler.Handle(message);
// Assert
mockBus.VerifyAll();
mockPaymentsDataStore.VerifyAll();
}
public void ConfirmOrder(int orderId, int customerId)
{
// Guards against duplicate messages - check if this order has already been accepted.
if (!this.orderAccepted)
{
// There could be additional validation here. For example, orders must be confirmed
// within x time from being "placed". The actual content of the order was validated
// when it was placed.
if (!this.orderPlaced)
{
throw new EventSourcingExampleAppException("Can't confirm an order that has not been placed.");
}
IOrderAcceptedV1 orderAcceptedV1 = new OrderAcceptedV1(customerId, orderId);
this.Apply(orderAcceptedV1);
}
}
public void Handle(OrderAcceptedV1 message)
{
this.orderAccepted = true;
}